CN1166182C - Soft scrolling method of closed-caption words - Google Patents
Soft scrolling method of closed-caption words Download PDFInfo
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- CN1166182C CN1166182C CNB971135827A CN97113582A CN1166182C CN 1166182 C CN1166182 C CN 1166182C CN B971135827 A CNB971135827 A CN B971135827A CN 97113582 A CN97113582 A CN 97113582A CN 1166182 C CN1166182 C CN 1166182C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
- H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
- H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
- H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
- H04N7/0884—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital for the transmission of additional display-information, e.g. menu for programme or channel selection
- H04N7/0885—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital for the transmission of additional display-information, e.g. menu for programme or channel selection for the transmission of subtitles
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/22—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of characters or indicia using display control signals derived from coded signals representing the characters or indicia, e.g. with a character-code memory
- G09G5/24—Generation of individual character patterns
- G09G5/246—Generation of individual character patterns of ideographic or arabic-like characters
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/22—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of characters or indicia using display control signals derived from coded signals representing the characters or indicia, e.g. with a character-code memory
- G09G5/30—Control of display attribute
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/34—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators for rolling or scrolling
- G09G5/343—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators for rolling or scrolling for systems having a character code-mapped display memory
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/488—Data services, e.g. news ticker
- H04N21/4884—Data services, e.g. news ticker for displaying subtitles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
- H04N5/44504—Circuit details of the additional information generator, e.g. details of the character or graphics signal generator, overlay mixing circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
- H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
- H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
Abstract
The present invention provides a soft scrolling method which is soft in vision and the caption therein can be selected by a viewer. According to the method, whether or not the present mode is a soft scroll mode is discriminated, and if so, character data is read out from a display memory, in which decoded caption information is stored, for a line or several lines at predetermined intervals into which a one-row scrolling time is equally divided. The readout character data is converted into a video signal to be displayed on the display screen.
Description
The present invention relates to a kind of soft scrolling method of audience selecting caption broad cast, particularly relate to and a kind of character and control code being carried when sending on TV signal, receive and show the soft scrolling method of the audience selecting caption broad cast of captions by receiving system according to spectators' selection.
Captions player method in the existing process of televising is divided into: at the valid interval overlapping text signal of TV signal, spectators can not selectively show open type captions (open caption) mode of burst news and notice by broadcaster's selection; At the non-valid interval of TV signal is vertical blanking interval when carrying caption signal and playing, and can watch audience selecting caption broad cast (closed caption) mode of television image and lines content by spectators' selection with the captions form.
The audience selecting caption broad cast broadcast mode is for the deaf individual that does not use sign language just can't understand the lines content in the picture designs, and begun this broadcast mode in 1978 in the U.S., and it is also extremely helpful to foreign language learning.
In March, 1994, No. the 5th, 294,982, laid-open U.S. Patents, provided a kind of audience selecting caption broad cast broadcast mode that is applicable to Rome literal and syllabic language.Wherein, especially to captions mode, done very detailed explanation such as syllabic language such as Koreans.Invention in the described United States Patent (USP), in order to play Korean in the audience selecting caption broad cast mode, a Korean literal is resolved into each phoneme such as sound, middle pitch, last or end syllable just, and send by the ASC II sign indicating number of corresponding each phoneme, receiving system is decoded to this ASC II sign indicating number, it is transformed into phonemes such as first sound, middle pitch, last or end syllable to show a Korean literal again.
The audience selecting caption broad cast mode of this existing Korean literal, for showing a Korean literal, need use two to three bytes at least, so transfer rate and display speed are slow, and in decode procedure, must make up three to four bytes seeking the position of a literal, so decoding processing complexity.The complicated rising that will cause the decoder cost of decoding process, this is with only comparing playing the necessary encoder of mechanism, and millions of spectators then need to bear expensive decoder.
And, want to show simultaneously Chinese character, Korean literal, Japanese, or show English, Russian, Greek simultaneously, and show that additional character is quite difficult.
And, in the process of display additional information, want the display station word information, and then display additional information the time, need to use control code, so lack independence between lines information and the additional information, for distinguishing mutually with the display mode of lines information, the hierarchy of control is more complicated on whole transmission efficiency, if and receiving system do not receive the display mode control code in action the zero hour, then before receiving next control code, will can not demonstrate lines information.
And, the disclosed invention of above-mentioned United States Patent (USP), be based on the U.S. the environment of televising, promptly develop based on the geographical environment that is essentially the flat-bottomed land, when being used for the mountain region and accounting for the geographical environment of the Korea S more than 70%, because the accepting state of receiving system is bad, so also there is the shortcoming of captions display quality variation.
Relate to the correlation technique of audience selecting caption broad cast mode, character broadcast and receiving system, also be disclosed in United States Patent (USP) 5,327, No. 176, United States Patent (USP) 4,310, No. 854, United States Patent (USP) 5,347, No. 365, United States Patent (USP) 5,249, No. 050, United States Patent (USP) 5,374, No. 960, United States Patent (USP) 5,315, No. 386, Japan Patent discloses flat 6-165, No. 065, and Japan Patent discloses flat 6-165, in No. 064.
The present invention proposes for solving the problems of the prior art, its objective is that providing a kind of can make the rolling of audience selecting caption broad cast feel soft soft scrolling method in vision.
In order to realize above-mentioned purpose, the audience selecting caption broad cast player method that the present invention relates to comprises the steps: to judge whether to be soft rolling mode; Under the situation that is soft rolling mode, in accordance with regulations time interval is read character data from the display-memory that stores decoded caption information, and the described time interval is that roller is rolled time interval of time five equilibrium of each row; The character data of reading is transformed to vision signal and is presented on the screen.
Be brief description of drawings below:
Fig. 1 is the structured flowchart of the television broadcasting system play of the realization audience selecting caption broad cast that the present invention relates to;
Fig. 2 is the structured flowchart of the radiovisor play of the reception audience selecting caption broad cast that the present invention relates to;
Fig. 3 is the formation schematic diagram of the caption signal that the present invention relates to;
Fig. 4 A, 4B are the formation schematic diagrames of the data set of the caption data that the present invention relates to;
Fig. 5 is the schematic diagram that the control code that the present invention relates to is described;
Fig. 6 A～6T is the Korean literal finishing type code table that the character code formation that the present invention relates to is described;
Fig. 7 is the schematic diagram that the size of caption area in phosphor screen that the present invention relates to is described;
Fig. 8 A, 8B, 8C are Korean literal, Chinese character, the character cell of English and the schematic diagrames of display unit when laterally writing of the present invention relates to is described;
Fig. 9 A, 9B, 9C are Korean literal, Chinese character, the character cell of English and the schematic diagrames of display unit when vertically writing of the present invention relates to is described;
Figure 10～Figure 12 is the picture state figure that rolling function when laterally writing is described;
Figure 13～Figure 14 is the picture state figure that rolling function when vertically writing is described;
Figure 15～Figure 17 be the soft scrolling method that the present invention relates to of explanation picture state figure;
Describe most preferred embodiment of the present invention with reference to the accompanying drawings in detail.
Fig. 1 represents a kind of structure with television playing device of audience selecting caption broad cast playing function.
As shown in the figure, by the audio signal of microphone 10 inputs, after 30 mixing of Audio Signal Processing portion and amplifying, be sent to TV signal modulation portion 50.By the vision signal of video camera 20 inputs, behind 40 amplifications of vision signal handling part and editor, also send into TV signal modulation portion 50.The audio signal of 50 pairs of inputs of TV signal modulation portion is carried out the frequency modulation modulation, vision signal is carried out the amplitude modulation modulation of residual sideband mode, and after amplitude-modulated signal and FM signal carried out frequency division multiplexing and frequency translation, deliver to high frequency efferent 60 as high-frequency signal, by high frequency efferent 60 high-frequency signal is amplified again, and TV signal is transmitted in the air by antenna.
In captions encoding section 70, by 71 inputs of character information input part lines information or the additional informations such as burst news and notice relevant with television image.The various control information that is used for captions control by 72 inputs of control information input part.Character information input part 71 comprises the keyboard of literal such as importing Korean literal, English, Chinese character, Japanese and spcial character, and the character information of input can be used as syllabic language, with the form output of for example two byte Korean literal finishing type sign indicating numbers (KSC5601).Control information input part 72 comprises mode selecting key, function selecting key etc., and the control information of input is exported with seven binary codes.
The MSB (highest significant position) of each byte in the two byte character sign indicating numbers that character code generating unit 73 will be imported uses as lines captions/additional information sign, when being additional information, MSB is changed to ' 0 ', append parity check bit on each byte, be total up to the data set of 18 character code with formation.
7 control informations that control code generating unit 74 will be imported are divided into high 4 and low 3, and on high 4, add corresponding parity check bit, two control code discrimination bit, lines/additional information sign forming upper byte, and on low 3, add corresponding first parity check bit, second parity check bit, two control code discrimination bit, lines captions/additional information sign to form low byte.The equal additional parity bit of each byte that is produced is total up to the data set of 18 control code with generation.The particular content relevant with described data set will be described later.
Data set modulation portion 75 is used digital modulation mode, to modulating at the data set of character code generating unit 73 or 74 generations of control code generating unit.
The synchronizing signal that is provided by vision signal handling part 40 is provided coincidence counter 76, and resets with vertical synchronizing signal, and horizontal-drive signal is counted, and to select the 262nd scan line of odd field, selects the 525th scan line when even field.The count value of window signal generating unit 77 input coincidence counters 76, and produce window signal.This window signal is to drive the drive signal that switch unit 78 carries out change action.Can be by the predetermined certain line of the vision signal of vision signal handling part 40 output, overlapping text signal on the 262nd and 525 scan lines for example by change action.
Fig. 2 represents a kind of structure that audience selecting caption broad cast is play the radiovisor that receives that is used for.
As shown in the figure, the TV signal of the channel that 110 pairs of tuners are selected from the high-frequency signal that antenna receives is carried out demodulation, and output audio signal and vision signal.Audio signal is sent into Audio Signal Processing portion 120, and the signal after balanced and the amplification is passed through loud speaker 130 as audio signal output.Vision signal is sent into vision signal handling part 140, exports as composite video signal after carrying out brightness and color treatments.Composite video signal enters display driver portion 160 by frequency mixer 150, and the composite video signal that 160 responses of display driver portion are imported drives CRT170 and demonstrate television image on screen.
In caption decoding portion 200, be sent to captions handling part 230 after by data extractor 210 vision signal being converted to digital signal.Data extractor 210 can adopt A-D converter or amplitude limit integrated circuit etc.Sync separator 220 is isolated synchronizing signal from vision signal, and vertical and horizontal-drive signal are inputed to captions handling part 230.
In described systems control division, to soft rolling instruction be sent to captions handling part 230 by the audience selecting caption broad cast of instruction input part input, and according to described instruction, read the character data of one or several scan line in captions handling part 230 time interval in accordance with regulations, be stored in caption signal among the RAM250 with output.Described specific time interval is the time interval that the time five equilibrium of rolling delegation is obtained.
Or/and press key input section constitutes, it should be able to import the following function command relevant with captions to described instruction input part 190 by remote controller.
Receiver can carry out the action that is defined function corresponding to following by remote control, also can add other function with appending.
The function of described definition is:
There is field-free interior caption data group of received to show
The demonstration of captions receiving sensitivity
Have or not bilingual to show
Have or not the reception of additional information to show
The on of captions
The on of additional information
The additional information page or leaf keeps function
Bilingual captions selection function
Vertically write and prevent function
Soft rolling function
In control code, have under the situation of soft rolling control code, read the character data of one or several scan line according to this control code time interval in accordance with regulations, be stored in caption information among the RAM250 with output.Described specific time interval is the time interval that the time five equilibrium of rolling delegation is obtained.
Contain character information among the font ROM240 with the corresponding bit-identify mode of Korean literal finishing type KSC5601 sign indicating number.
The following describes the concrete constituted mode of the caption signal that is used for described captions broadcast and receiving system.
In Korea S, what be used for play signal is 525 scan lines, 60/second M-NTSC standard TV signal, and stipulates that vertical loop line black-out intervals is, the 1st to the 20th scan line of odd field, and the 264th to the 282nd scan line of even field.
The standard that linked groups does not provide the signal of relevant vertical line black-out intervals to use as yet, but ITU-R can be advised that the content that provides among the FCC report of the Rec473-2 and the U.S. and instruction (Report and Order) 83-120 is as a reference.
In order to transmit caption data, caption signal can use a certain in the 10th to the 20th horizontal scanning line of vertical tropic black-out intervals or the 21st, the 262nd, the 525th scan line between active video area.Be to increase the data conveying capacity, or, also can use the scan line of one or more for other purpose.
The transmission bit rate of caption data is necessary for 447443.125bps+125bps, the maximum of long-time rate of change should be ± 196 with interior (0.0125bps), caption data signal only is used for the transmission of colour TV signal, transmit bit rate be set at chrominance subcarrier frequency fsc (3579545 ± 10Hz) 1/8, and should with the chrominance pulse Frequency Synchronization.Described chrominance carrier preferably has the continuous phase between scan line and the scan line.When because picture editing etc. is former thereby when making the phase place of chrominance carrier discontinuous, bottom line also should make the position synchronised of this scan line and chrominance pulse.
The data-modulated mode is used two-phase phase modulated (BPSK; Binary Phase Shift Keying is called BPSK below), also be phasing back modulation (PRK; Phase Reversal Keying is called PRK below).The counterlogic value be ｀ 1 ' be to be that the sine wave of one-period of the frequency of 0 degree tool fsc/8 (447.443kHz) is represented with phase place, counterlogic value ｀'s 0 ' is to be that 180 sine waves of spending the one-period of the frequency with fsc/8 (447.443kHz) are represented with phase place.The maximum magnitude of phase jitter is ± 10 degree.The optimum signal waveform changes according to the spectral characteristic of television channel, therefore can stipulate afterwards.Yet, because according to basic frequency band limits frequency, the BPS waveform may produce very strong distortion phenomenon in the zone that produces the logical value variation, so will be used for through the revised waveform of twice Butterworth (Butterworth) filter phases with 3.5MHz blocking frequency playing.The impulse response formula of employed Butterworth filter is provided by following formula (1):
(wherein, f
c=3.5MHz)
In I-7 (office televises) project 4 (the multiple broadcasting of character) " na " (superposed positions of data wire and the amplitude of character signal) of office in the inspection item that Korea S is wireless, defined inspection method and according to.Because the waveform of caption signal is not NRZ waveform but pure sine wave, thus not necessarily to adopt above-mentioned standard, but, can receive the region in order to enlarge according to the regional characteristic that accounts for as the Korea S mountain region more than 70%, its sinusoidal wave maximum is 90 ± 5IRE.Though determined the peak swing of normal data signal, by factors such as filter bandpass shapes and contain pulse spike, so the maximum value of pulse spike is decided to be 5IRE.
Below, as shown in Figure 3, the data wire of caption signal is made of bit clock synchronizing signal 302, word initial signal 304 and the 18 bit data row 306 in 6 cycles.
Bit clock synchronizing signal 302 is the sine waves in one 6 cycle, can extract this signal from caption decoding portion, and uses when judging the bit period of 18 bit data, and its frequency is fsc/4 (894.886KHz).When the phase place of the chrominance carrier of this scan line is 0 when spending, begin from trailing edge intermediate point (0H) distance 9.5 μ sec (34 cycles of burst signal) with horizontal-drive signal, and when the phase place of the chrominance carrier of this scan line be 180 when spending, then from trailing edge intermediate point (0H) distance 9.64 μ sec (34.5 cycles of the burst signal) beginning of horizontal-drive signal.Because this signal is that the burst signal with this scan line is synchronous, so also can extract the bit clock synchronizing signal from burst signal.
Shown in Fig. 4 A, 4B, data set is made of parity check bit p, captions/additional information sign (C/T) and code value three parts of character cell.D0～D8 is called as low word, and D9～D16 is called as high-word.D17 is the even parity position about D0～D17.This parity bit at first detects the error code in the transmission.D7 and D16 are captions/additional information sign, are 0 when being captions, be 1 when being additional information, and the value of D7 and D16 must be consistent.This sign can be used for guaranteeing the precedence bit of character cell.D0～D6 and D9～D15 all represent code value.When being " 0 ", the code value of D5, D6, D14, D15 then analyzed as being control code, otherwise analyzed as character code.
Among Fig. 5, the D1 of 7 control codes, D2, D3, D9, D10, D11, D12 are the control code data bit, and D0, D4, D8, D13 are the parity check bits about the control code data bit.3 bit code values of low word are used to specify five kinds of functions, and these five kinds of functions are the look appointed function, and character attibute reaches and goes up rolling function, and display packing reaches rolling function down, position locomotive function, ranks position appointed function.4 bit code values in the high-word of control code have been specified 16 subfunctions of each function.Here, D0 is the parity check bit about D1, D2, D3, D4, and D4 is the parity check bit about D1, D2, D10, D11, and D13 is the parity check bit about D9, D10, D11, D12.
And, for receiving, the safety of guaranteeing data transmits control code continuously twice, and transmit every 4 second period ground and laterally write/vertically write designated code and ranks position designated code.Specifying in the back of control code carried out.
Shown in Fig. 6 A～6T, the D0～D6 in the low word of character code and the D9～D15 of high-word represent the data bit of KSC5601 sign indicating number jointly.D8 is the even parity position about D0～D7.
Because the present invention do not use the ABCII sign indicating number fully, thus these 7 of D0～D6 corresponding to except that MSB 7 in the low byte of KSC5601, and D9～D15 is corresponding to except that MSB 7 in the upper byte.In the Korean literal finishing type sign indicating number (KSC5601) shown in Fig. 6 A～6T, use by a1～a2 capable (spcial character), a3 capable (numeral and English), a4 capable (consonant that constitutes by last or end syllable in the Korean literal), a5 capable (Greek), aa～ab capable (Japanese ideogram), ac capable (Russian), b0～c8 capable (Korean literal), ca～fd capable (Chinese character).Character code only sends once corresponding to a character.
As mentioned above, the Korean text subtile can utilize the arbitrary row in each to send, and the more than one transmission row that is limited in the field is defined as channel.The TSC-system TV constitutes two fields with interlace mode, therefore uses two channels.That is to say that can use for example bilingual subtitles of multiple sound, wherein Korean literal specific subtitles should be used the odd field channel, and the captions of other foreign language special use should use the even field channel.The control code that each channel transmits has identical code character, and all character codes all are included among the KSC5601.
There are two kinds by captions with the information that channel transmits, also inequality corresponding to the implication and the display packing of its variety classes control code.Wherein a kind of be with play in the relevant captions of picture signal, and another kind of be with picture on the incoherent additional information of play content (TEXT) seen.
In the low word and high-word of data burst structure, entirely,, all think to be used to show captions no matter code value then is control code or character code if the value of captions/additional information sign is 0.At this moment, Yi Bian it only covers the part of picture, Yi Bian demonstrate and the corresponding to lines of audio signal with the captions form.
In order only to use simultaneously the captions of 2～5 row, and show continuous lines, can adopt the method that rewrites again after the mode of should the zone rolling or the cancellation.
When only transmitting with a channel, can use kinds of words with, perhaps it is used as special use of Korean literal or foreign language dedicated channel, and when adopting two channels to send, then can divide into Korean literal dedicated channel and foreign language dedicated channel and use.
Because described lines captions should be consistent as far as possible with audio-frequency information, so in the channel occupancy of two character cells, these lines captions have higher priority than additional information.
In the low word bit and high word bit of data burst structure, entirely,, all think to be used for display additional information no matter code value then is control code or character code if the value of captions/additional information sign is 1.Additional information shows with play content irrelevant, resembles the compunication character display information on whole image.Owing to be presented on the whole image, so do not use rolling function.
When using two channels to transmit, additional information needn't resemble separates the lines information, as long as be not loaded with lines information in channel, then additional information just can at any time occupy channel.In the time should transmitting the lines captions, abdicate the right of possession corporeal right of channel immediately, and after the transmission of lines captions finishes, occupy channel again.
Below, the opening demonstration when receiver is adopted the horizontal ways of writing of captions describes.
As shown in Figure 7, caption area 702 is meant the shown lines captions in the whole active area scope and the maximum region of additional information.In a field unit with the TSC-system TV signal, caption area 702 begins to finish to scan line 240 from scan line 41, so each has the television scan line height that is equivalent to 200.Show ten line characters at whole caption area.The width of caption area is decided to be about 80～85% of effective scanning line width (52.6 μ sec).Therefore, the lateral length of whole character row is 80～85% of an effective scanning line width.
The display unit of Korean literal, English, Chinese character is made of vertical 20 bitmaps altogether, so for easy demonstration, the character row (Row) that Korean literal, English, Chinese character constitute is made of 20 television scan lines.
In each row, the Korean literal that can laterally show and the maximum number of Japanese ideogram are decided to be 18.Because the width of an English alphabet is half of width of a Korean literal, so the maximum number of displayable English alphabet is 36 in each row.The display mode of the literal of the Rome family of languages, Arabic numerals, article symbol etc. is with English identical.
The width of a Chinese character is identical with the width of a Korean literal, so the maximum number of displayable Chinese character is 18 in each row.
But all characters that mixed display is supported by the KSC5601 sign indicating number.The displayable maximum number of words of each row is 18 to 36 when mixing use.
Shown in Fig. 8 A～8C, on picture during character display, do not consider the gap between the character on the picture, only the zone that occupies of character self is called character cell (804,814,824), and the occupied zone of character that will comprise the gap around the literal is called display unit (802,812,822).
In receiver, be presented at the character cell 804 of the Korean literal of a syllable on the picture, have horizontal 16, vertical 16 bitmap format.Thereby the Korean literal that will enter character cell is read from the ROM that stores horizontal 16, vertical 16 bit-mapped font.
In Fig. 8 A, the display unit 802 of a syllable Korean literal in gap between the consideration character of receiver has horizontal 18, vertical 20 bitmap format.This be because on the character cell 804 of Korean literal, be respectively equipped with the gap of delegation on left and right three directions, and below be provided with the delegation gap in, also be provided with 2 cracks in the ranks, to be used to set the situation in underscore zone 806.
The form of the Japanese ideogram that is shown by receiver is identical with the Korean literal.
Shown in Fig. 8 B, be presented at the character cell 814 of the Chinese character on the receiver picture, have horizontal 17, vertical 19 bitmap format.The size form of Chinese character unit 814 is temporary transient, can consider that afterwards condition on font ROM and the receiver circuit determines the character cell of a different size (horizontal 16, vertical 16).
The consideration of receiver the Chinese character display unit 812 in gap between the character, have horizontal 18, vertical 20 bitmap format.This be because the right-hand of the character cell 814 of Chinese character and below be respectively equipped with the gap of delegation, and with Korean literal or English different, it does not have the underscore zone corresponding to a word.
Therefore, the width of Chinese character display unit 812 with highly all with the width of the Korean literal display unit 802 of a syllable and highly identical, so a Chinese character has identical size with a Korean literal.
Shown in Fig. 8 (C), be presented at the character cell 824 of the English alphabet on the receiver picture, have horizontal 8, vertical 14 bitmap format.
In receiver, considered the display unit 822 of the English alphabet in gap between the literal, have horizontal 9, vertical 20 bitmap format.This is because two cracks and in the right-hand cause that the delegation gap is set in the ranks are set above the character cell 824 of English alphabet, below be provided with two in the ranks in the crack, consider the vacant zones that underscore zone 826 also is provided with two row will be set.
Therefore, the width of English alphabet display unit 822 is 0.5 times of Korean literal display unit 802 width of a syllable, and both height are identical, so a Korean literal has and two sizes that English alphabet is suitable.
The other Languages and the Arabic numerals of the Rome family of languages beyond English, and the article symbol that is included in space between the word etc., the display format on receiver is identical with English.
Character in the display unit in receiver shows processing mode, carries out opaque bottom reason or outer contour processing by ｀ background color appointment ' control code, and can be converted to the demonstration of the translucent end the opaque end.
Receiver is processed into the opaque end of the Korean alphabetic character size with a syllable with the rear portion of the front portion of first character in each row and last character with opaque bottom reason mode character display the time, make read more convenient.
Below control code shown in Figure 5 is described in detail.
Control code is combined by two 9 words, and low word comprises D1, D2, the D3 position that is used for functional classification, and high-word comprises D9, D10, D11, the D12 position that is used for some subfunctions of function after the selection sort.
Control code can be that color is specified, attribute is specified according to its functional classification, show that appointment, rolling, cursor move, line position and column position specified control sign indicating number.
Color specified control sign indicating number is the prospect of the character data that for a change is transmitted and end color and the control code that transmits.Therefore, in the prospect and end color of the character that will change transmission, can after transmitting the look designated code, send character again.Receiver is determined its prospect and end color according to the up-to-date color specified control sign indicating number that receives.And the color at the prospect and the end can simultaneously or change independently.Color can be appointed as black (Black), red (Red), peony (Magenta), blue look (Blue), cyan (Cyan), green (Green), yellow (Yellow), white (White) etc.When background color is Transparent color, can in display unit, sees in progress program image by the remainder except that character, and use the color different that each character has been carried out the outer contour processing with character color.
The character attibute control code is the attribute of character data for a change and the control code that transmits.Therefore, in the time of changing the character attibute of transmission, can transmit attribute specified control sign indicating number earlier, and then transmit character code.Appointments such as it can carry out normally, underscore, flicker, anti-white demonstration.Owing to normal, underscore, flicker, anti-white demonstration etc. all can act on independently, so can once use above-mentioned whole attributes simultaneously.
The function of each attribute specified control sign indicating number is as described below:
Zero underscore: under each character that demonstrates, demonstrate underscore.
Zero flicker: the character that flicker demonstrates.The part of not glimmering and before having shown, the part of demonstration after only glimmering, flicker cycle can be different with the specific implementation of receiver.
Zero anti-white demonstration the: change foreground color and end color that receiver uses at present.
Zero is normal: recover all appointed attributes, (default) attribute display character when default.
The display packing control code is to open the control code that display mode transmits for control, and it is used to specify out demonstration, close to show, receive and store, laterally write, vertically write etc.
Zero opens demonstration: the character data that receives directly is presented on the picture (go up roll, when rolling down), and receives storage ' control code according to ｀ the data of storing are presented at (during Eject mode) on the picture.
Zero receives storage: be stored in out the character and the control code that receive before showing.
Zero laterally writes: when the character code that will not receive continuously by position change control code is presented on the picture continuously, the character late position is moved to the right side of current character.
Zero vertically writes: when the character code that will not receive continuously by position change control code is presented on the picture continuously, make the following side shifting of character late position to current character.
The rolling control code is the control code that is used for carrying out picture rolling behind the definite part in selected letter zone, this rolling control code comprise ｀ 2～5 row go up roll ' and ｀ 2～5 row roll down '.
0 2～5 row upward roll: be the control code that makes by rolling delegation and demonstration on the windows content of top 2～5 row formations that comprise current character display position (cursor position), eliminate the lastrow in the selected window along with rolling, next line is replaced by the character of up-to-date decoding.When using this control code, do not need other APDR (moving) sign indicating number to the next line starting character position, all characters of specified window outside disappear from picture.
Roll under 0 2～5 row: be the control code that makes by rolling delegation and demonstration under the windows content of top 2～5 row formations that comprise current character display position (cursor position), eliminate the next line in the selected window along with rolling, the character by up-to-date decoding is replaced.When using this control code, do not need other APUR (moving) sign indicating number to the lastrow starting character position, all characters of specified window outside disappear from picture.
It is the control code that the direction about the character display position moves that control code is moved in the position.
Zero APF (Active Position Forword, active position forward): the main direct of travel of writing along character when laterally writing (right side) moves half (an English alphabet width) of a Korean literal width.When vertically writing, move the height of a Korean literal along main direct of travel (downside).
Zero APB (Active Position Backword, active position backward): half (an English alphabet width) of when laterally writing, writing the mobile Korean literal width of rightabout (left-hand) of main direct of travel along character.Rightabout (to upside) along main direct of travel when vertically writing moves a Korean literal height.
Zero APDR (Active Position Down Return, active position changes down): when laterally writing, move to the just descending leftmost side character position of current character display position (first column position).When vertically writing, move to the uppermost character position of the positive left-hand line of current character display position (first line position).Move the height of a Korean alphabetic character along main direct of travel (downside).
Zero APUR (Active Position Up Return changes on the active position): when laterally writing, move to the just up leftmost side character position of current character display position (first column position).When vertically writing, move to the uppermost character position (first line position) of the positive right-hand column of current character.
0 3～6 word APF: the APF that when laterally writing, carries out about 3～6 English alphabet width.When vertically writing, carry out the APF of about 3～6 English alphabet height.
Illustrate the position below and move some exceptions of control.When laterally writing until the rightmost side character position (the 18th column position) of row when also having character to show, roll if on having APDR, APUR, APB, 2～5 row, roll, under 2～5 row etc. and to move relevant control with the appropriate location and when receiving character code, then can not change row, and move to left-most position (first column position) the back character display of this row.Just, if the space code that at this moment receives then will ignore, till receiving the nonspace character sign indicating number.In vertically writing, if when the nethermost character position (the 10th line position) of row also has character to show, roll if on having APDR, APUR, APB, 2～5 row, roll, under 2～5 row etc. and to move relevant control code with the appropriate location and when receiving character code, then can not change row, and move to uppermost position (first line position) the back character display of these row.Just, if the space code that at this moment receives then it is ignored, till receiving the nonspace character sign indicating number.
As described below according to the control code load mode of opening display mode.
Control code transmission during Eject mode is in proper order: receive storage+(other control code)+character row+(other control code)+...+close show+open demonstration+reception storage+(other control code)+character row+(other control code)+...+pass show+open demonstration+....Be presented at character information on the screen for spectators are normally watched with Eject mode, sending part send show wipe control code before, need suitable time of delay.
Control code transmission during last roll is in proper order: open demonstrations+(other control code)+character row+(other control code)+character row+(2～5 row are gone up rolling code)+open demonstrations+(other control code)+character row+(other control code)+character row+(2～5 go upward rolling code)+....Whenever receiving 2～5 row when going up the rolling control code, should wipe the window perimeter of regulation with transparent color.
Control code transmission when rolling down is in proper order: open demonstration+(other control code)+character row+(other control code)+character row+(2～5 row down rolling code)+open demonstrations+(other control code)+character row+(other control code)+character row+(2～5 row are rolling code down)+....When receiving 2～5 capable times rolling control codes, should wipe the window perimeter of regulation with transparent color.
Being specified by TV station under the situation of soft rolling, when specifying the soft rolling mode that rolls and roll down on described, is to roll or soft rolling control code is inserted in the back of following rolling control code last.
The following describes the processing mode of the control code when vertically writing.
Receiver is decoding when vertically writing control code, the direct of travel of the Korean Chinese character that shows on the picture can be switched to column direction.
Vertically write to be mainly used in play content and exist in the captions.The structure of the character cell when vertically writing does not need the respective symbols unit of each character when laterally writing identical.
Shown in Fig. 9 A, 9B, 9C, the size of the display unit that all kinds character has when vertically writing all is consistent, and is irrelevant with the size of the respective symbols unit of various characters.For instance, when vertically writing, comprise the gap between the character, the Zone Full that English alphabet occupies on picture should be identical with the Zone Full that a syllable Korean alphabetic character occupies.If when laterally writing, adopt character font data, then because the width of English character unit is half of Korean alphabetic character cell width of a syllable, so when showing vertically write English, shown in Fig. 9 C, the position of the English character unit in display unit, the right side that should be comprised in Korean alphabetic character unit is in half.When vertically writing, owing to be positioned at the right side of character cell according to the position of the underscore of underscore appointment, so the structure of display unit different when laterally writing, it can be definite respectively according to the visual field of receiver.Yet when vertically writing, the size of display unit also should be able to comprise the character cell of various literal.
When vertically writing, the narrow words in crack are difficult for reading because the row gap is compared in the ranks, so preferably the character row array structure in the caption area is recombinated.That is to say that when vertically writing, broaden for making the row gap, the columns that is presented at receiver is 16 row, each is listed as displayable character number is 10.When vertically writing, because various characters have the character cell of same size, so, adopt the character row array structures of 10 row * 16 row as if character display on whole image.The transverse width of the caption area of this caption area when laterally writing is identical, and it highly should be more lower slightly or equal.Therefore, the row gap when vertically writing, the row gap when laterally writing is wideer, and in the ranks can be narrower or equate in the crack, vertically writes therefore easilier.The row gap should be uniformly-spaced.
When vertically writing, if do not receive special Position Control sign indicating number, then default (default) position of receiver is decided to be first character position of the 16th row.
When vertically writing, determine that as benchmark cursor moves effective (active) locality of control code (APDR, APUR, APF, APB, n-APF) with the perpendicular row of character direct of travel.That is, be defined as downwards=left side, upwards=right side, forward=downside, backward=upside.APDR be defined as being used for ｀ move to the uppermost character position of positive left column (first line position) ' control code.APUR be defined as being used for ｀ move to positive right row uppermost character position (first line position) ' control code.
When vertically writing, 2～5 row are gone up rolling code and are, comprise current character display position (cursor position), by the window interior that 2～5 the vertical character rows in right side (column) constitute, make windows content to the picture right side control code that row show of rolling.It is listed as with rolling the rightmost side of the character row in the chosen window to disappear, and row that make the leftmost side simultaneously are by being replaced by the character of up-to-date decoding.When using this control code, do not need to re-use other APDR (when vertically writing, moving to left-hand line character position topmost) sign indicating number, the Zone Full beyond 2～5 row windows is wiped by transparent color.When vertically writing, 2～5 row down rolling code are, comprise current character display position (cursor position), by the window interior that 2～5 the vertical character rows in left side (column) constitute, the control code that makes windows content roll row and show to the picture left side.It makes the leftmost column of the character row in the chosen window disappear with rolling, and the rightmost side is listed as by being replaced by the character of up-to-date decoding.When using this control code, do not need to re-use other APDR (when vertically writing, moving to right-hand column character position topmost) sign indicating number, the Zone Full beyond 2～5 row windows is wiped by transparent color.
The following describes the control code that is used for additional information.
Additional information is owing to be to be that unit transmits character code with the page or leaf, thus need be used for the ｀ page or leaf that page or leaf handles and begin ', the ｀ EOP ' etc. control code.The ｀ page or leaf begins ' is equivalent to ｀ two row of lines captions and goes up rollings ' control code, ｀ EOP ' the be equivalent to ｀ two row rolling down of lines captions ' control code.
Zero page of beginning: one page of expression additional information begins, and receiver begins the storage of one page when receiving this control code.If when page or leaf begins, do not receive this control code, then abandon the total data of this page.
Zero EOP: an EOP of expression additional information, receiver show this page data that has received on picture when receiving this control code.
When additional information enters a new line, must transmit in APDR, APUR and the column position specified control sign indicating number.
Before showing one page additional information data on the picture, should wipe picture by the end color of the page or leaf that will show, so need the end color of one page unit.Can begin being right after at the ｀ page or leaf ' color sign indicating number of the next end behind the sign indicating number is as color at the bottom of this page, if be right after at the ｀ page or leaf begin ' do not receive end color sign indicating number after the sign indicating number, page end color before then adopting as page or leaf at the bottom of color.
Owing to vertically write is to be used for the occasion that news etc. has the bottom captions originally, therefore can ignore.And, can also ignore that 3～5 row go up to roll and the rolling down of 3～5 row.
The following describes the differentiation and the processing mode thereof of effective code.
Receiver is undertaken by following order the step and the processing procedure of caption signal decoding and differentiation effective code.
1. have only D7 identical, just be judged to be effective code with D16.
2. check D17 and D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
Whether D16 is identical, is judged to be effective code when identical.
3. if D5, D6 are respectively (0,0), D14, D15 also are respectively (0,0), then are judged to be control code.If D5, D6 are respectively (0,1) or (1,0) or (1,1), and D14, D15 are respectively (0,1) or (1,0) or (1,1), then are judged to be character code.If some being respectively (0,0) among D5, D6 and D14, the D15, and another is (0,1) or (1,0) or (1,1), then owing to there not being the situation that receives control code and character code simultaneously, so this sign indicating number is judged as error code.
4. if when in above-mentioned steps 3, being judged to be character code, then check D8 and D0
D1
D2
D3
D4
D5
D6
Whether D7 is identical, is judged to be error code when inequality.
5. be not error code if in above-mentioned step 4, be judged to be, then confirm whether be the character code of KSC5601 definition, if do not have the sign indicating number of definition then to be shown as ｀? ' or ｀ ■ ', if the sign indicating number of definition then shows this character on picture.
6., then check D0 and D1 in the low byte if when in above-mentioned step 3, being judged to be control code
D2
D3
Whether D9 is identical, and D4 and D1
D2
D11
Whether D12 is identical, as long as when having one in above-mentioned two when inequality, be judged to be error code.
7. not error code if in above-mentioned steps 6, be judged to be, whether then confirm, if do not have the sign indicating number of definition then to be judged to be error code, if the control code of definition then enters the state that repeats to transmit same low word and high-word of waiting for by control code table definition shown in Figure 5.
8. if when repeating to transmit same low word and high-word, then use this control code.
The judgement and the processing mode of above-mentioned effective code are represented most preferred embodiment, also can use similar therewith variant embodiment.For instance, control code also can have the combining form of different parity check bits.Especially in order to prevent the error code of control code, can adopt different ways.
The following describes aforesaid action effect of the present invention.
By adopting the above-mentioned control code and the combination of character code, open display category and can comprise that lines captions rolling explicit representation, lines captions eject three kinds of explicit representation, additional information explicit representations etc.
In laterally writing and vertically writing if roll and following rolling control code in the combination, can be up and down, left and right four direction produces rolling.
At first going up when laterally writing rolled and described, and omitted the explanation to moving down.Transmit the sign indicating number string by＜black matrix-black matrix-wrongly written or mispronounced character-wrongly written or mispronounced character-laterally write-laterally write the-the tenth row-Di ten row-secondary series-secondary series-Kai demonstrations-Kai to show-(representing that Korean pronounces) " da "-" um "-" un "-space (space)-R-OL-L-" pyo "-" shi "-" hup "-" eui "-" de "-" ei "-" ta "-space-" jun "-" song "-" ae "〉formation.Therefore, as shown in figure 10, on the black matrix of picture, demonstrated wrongly written or mispronounced character.Then, if the sign indicating number string of transmission＜two row go up-two row that roll go up rolling-" dae "-" han "-" ye "-" rul "-space-" bo "-" in "-gut-" ei "-" da "-., then as shown in figure 11, the delegation of on picture, rolling.Similarly, if the sign indicating number string that then transmits for＜two row go up-two row that roll go up rolling-" to "-" han "-space-" jul "-" eul "-R-OL-L--U-P-" shi "-" kin "-" da "-., then as shown in figure 12, wipe the character row and the delegation that moves up of the 9th row.
To the left rolling describes when vertically writing below, and has omitted the explanation of moving to the right.Transmit the sign indicating number string for＜close demonstrations-pass demonstration-black matrix-black matrix-wrongly written or mispronounced character-wrongly written or mispronounced character-vertically write-vertically write-second to go-the second row-Di 15 Lie-15 Lie-Kai demonstration-Kai demonstration-" ei "-" bun "-" ae "-" nun "-space-" se "-" ro "-" seu "-" gi "-APDR-APDR-R-O-L-L-space-" pyo "-" gi "-" eui "-space-" ye ".Therefore as shown in figure 13, on the black matrix of picture, show wrongly written or mispronounced character with vertical ways of writing.Then, if the sign indicating number string that transmits for＜two row go up-two row that roll go up rolling-APDR-APDR-" rul "-space-" bo "-" in "-space-" gut "-" ei "-" da "-., then as shown in figure 14, the delegation of on picture, rolling to the left.
Shown in Figure 15 to 17,, also can be called on the one scan line and roll according to soft rolling of the present invention.
That is, as shown in figure 15, carrying out under the state that rolls on 2 row, spectators are if select soft rolling with remote controller, when from display-memory, reading character data, not to read, while but scan line is changed item by item read with each row with subtitle processor.That is to say, after time that each row go up is rolled carries out 20 branches such as grade, by rolling on every scan line, so that the captions that show mildly roll by Figure 15,16,17 order.
Owing to do not know when receiver works, thus play the operator should make the control code of playing once corresponding display position in per about four seconds, the Play System of the symbol string of configure transmitter suitably.Behind operation of receiver, when not knowing correct position and mode of operation, the receiver of basic service regulation shows the character code that receives at default position, if receive control code once in per four seconds, then wipe existing display frame, carry out work by new control code.
Receiver begins the back if do not know correct position and mode of operation at captions, then on default (default) position of each pattern, show the character code that receives by lacking the timesaving display mode, if receive per four seconds play once laterally write/vertically write designated code and row/column position designated code, then wipe original display frame, by new control code work.
The user if changed television channel, has caption signal even transmit in the television channel after changing when utilizing lines captions and additional information, also removed the captions demonstration, and only shown common television image.
Play the moment that the user selects the lines captions when opening receiver, if do not receive special control code, then receiver keeps the attribute disarm state, directly shows the black matrix wrongly written or mispronounced character in the position of the tenth row first row of laterally writing caption area.
As mentioned above, in the present invention, audience selecting caption broad cast is when last rolling and following the rolling, not that shown captions are rolled with each row, but the specific time interval that obtains by the time five equilibrium that each row is rolled carries out soft rolling, shown captions is visually seemed roll naturally.
Claims (5)
1. the soft scrolling method that shows of an audience selecting caption broad cast, wherein, to be presented on the display screen of the receiving system that spectators select at the caption information of encoding on the horizontal line of the field that does not influence this broadcast singal of television broadcasting signal, described soft scrolling method comprises the steps:
Judge whether present mode is soft rolling mode;
At present mode is under the situation of soft rolling mode, from the display-memory that stores decoded caption information, by etc. branch's rolling time and the specific time interval that obtains is read a line or multi-thread character data;
The character data of reading is converted to vision signal and is presented on the display screen.
2. the soft scrolling method that shows according to the audience selecting caption broad cast of claim 1 is characterized in that, described soft rolling mode is that the user by receiving system specifies.
3. the soft scrolling method that shows according to the audience selecting caption broad cast of claim 1 is characterized in that described soft rolling mode is to be specified with control code by broadcast office.
4. the soft scrolling method that shows according to the audience selecting caption broad cast of claim 1 is characterized in that, each row rolling time is carried out five equilibrium and the specific time interval that obtains is in 20 lines.
5. the soft scrolling method that shows according to the audience selecting caption broad cast of claim 1 is characterized in that, described regulation line be at interval 1 line at interval.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR14440/96 | 1996-05-03 | ||
| KR14440/1996 | 1996-05-03 | ||
| KR1019960014440A KR100212134B1 (en) | 1996-05-03 | 1996-05-03 | Soft scroll method of viewer selection type caption display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1169081A CN1169081A (en) | 1997-12-31 |
| CN1166182C true CN1166182C (en) | 2004-09-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB971135827A Expired - Lifetime CN1166182C (en) | 1996-05-03 | 1997-05-03 | Soft scrolling method of closed-caption words |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6208383B1 (en) |
| KR (1) | KR100212134B1 (en) |
| CN (1) | CN1166182C (en) |
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-
1997
- 1997-05-03 CN CNB971135827A patent/CN1166182C/en not_active Expired - Lifetime
- 1997-05-05 US US08/851,540 patent/US6208383B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US6208383B1 (en) | 2001-03-27 |
| CN1169081A (en) | 1997-12-31 |
| KR100212134B1 (en) | 1999-08-02 |
| KR970078600A (en) | 1997-12-12 |
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